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A140643
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First differences of A140642.
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1
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1, 1, 1, 1, 1, 2, 2, 1, 1, 4, 4, 1, 1, 2, 8, 8, 2, 1, 1, 4, 16, 16, 4, 1, 1, 2, 8, 32, 32, 8, 2, 1, 1, 4, 16, 64, 64, 16, 4, 1
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,6
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COMMENTS
| (*) Main diagonal = A011782 but vertical = 1, A011782 unknown.
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FORMULA
| Also a triangle on line (*): 1; 1, 1; 1, 1, 2; 2, 1, 1, 4; 4, 1, 1, 2, 8; 8, 2, 1, 1, 4, 16; 16, 4, 1, 1, 2, 8, 32; 32, 8, 2, 1, 1, 4, 16, 64; Row sums:1, 2, 4, 8, 16 =A000079(n). Note even palindromes finishing a row and beginning next one.
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CROSSREFS
| Sequence in context: A123566 A201757 A053390 * A108017 A133135 A191687
Adjacent sequences: A140640 A140641 A140642 * A140644 A140645 A140646
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KEYWORD
| nonn,uned
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), Jul 08 2008
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